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Hi, I am experiencing a ton of crashes with my newly bought Mark 4. I am wondering wether I am doing something really wrong, or if something is up with my device. I have bought the pro edition, so it comes with the extra antenna (someone on IRC referred to it as the "alpha antenna", not sure if thats what it's called). I have updated my device to the latest available release, 2.8.1. I have disabled all running services such as the Karma service. Crashes I experience: on this command sequence, at the very moment I bring the interface back up, the entire device crashes and goes into a reboot: ifconfig wlan0 down iwconfig wlan0 mode monitor ifconfig wlan0 up *crash* I can use airmon-ng -i wlan0, then this interface works, it creates a mon0 interface, however, it can then just scan on whatever channel I have previousely put it on. A second issue I experience is with the external antenna. Here I can do the above sequence just fine. I can also use airodump to scan for channels, but as soon as I try to run "wash" or "reaver" on that antenna, the antenna crashes and I observe the following log in "dmesg": [ 1699.820000] device wlan1 entered promiscuous mode [ 1738.810000] usb 1-1: USB disconnect, device number 4 [ 1738.880000] usb 1-1: ath9k_htc: USB layer deinitialized [ 1739.380000] usb 1-1: new high-speed USB device number 5 using ehci-platform [ 1744.560000] usb 1-1: ath9k_htc: Firmware htc_9271.fw requested [ 1744.950000] usb 1-1: ath9k_htc: Transferred FW: htc_9271.fw, size: 51272 [ 1745.190000] ath9k_htc 1-1:1.0: ath9k_htc: HTC initialized with 33 credits [ 1745.390000] ath9k_htc 1-1:1.0: ath9k_htc: FW Version: 1.3 [ 1745.390000] ath: EEPROM regdomain: 0x833a [ 1745.390000] ath: EEPROM indicates we should expect a country code [ 1745.390000] ath: doing EEPROM country->regdmn map search [ 1745.390000] ath: country maps to regdmn code: 0x37 [ 1745.390000] ath: Country alpha2 being used: GB [ 1745.390000] ath: Regpair used: 0x37 [ 1745.390000] ieee80211 phy4: Atheros AR9271 Rev:1 [ 1745.570000] Registered led device: ath9k_htc-phy4 Am I doing something wrong, using unsupported methods or tools? I am kind of in the dark here to what the issue might be. I've already tried to replace the cables and made sure its powersource is externally fed (as I thought it might have been a powerconsumption issue). Cheers, Saint K.